Abstract: General bearings of agricultural machinery in China encounter a series of problems during disassembly, and due to inadequate maintenance, they are prone to being affected by the external environment, causing problems such as dust and moisture. This creates unnecessary problems for the normal use of agricultural machinery and between bearings, making it difficult to repair and disassemble them. This article mainly studies and analyzes the device for dismantling bearings commonly used in agricultural machinery, and effectively solves the existing problems, fundamentally ensuring the normal use of agricultural machinery, reducing the intensity of farmers' labor, and improving the work efficiency of agricultural machinery.

Keywords: agricultural machinery; Universal bearings; Dismantling device

Bearings are the main equipment of mechanical tools and belong to the infrastructure of machinery. Once bearings fail or have problems, they will directly affect the normal operation of mechanical equipment, reduce the efficiency of agricultural machinery, and have a direct impact on the accuracy, noise, sensitivity, thermal deformation, and other aspects of machinery. This requires strengthening research on it, ensuring the integrity of the bearings during maintenance, and effectively and safely separating them. This is also a major challenge for dismantling and maintaining general bearings for agricultural machinery.

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1. A Brief Introduction to the Dismantling Device for General Bearings of Agricultural Machinery

At present, in order to solve the maintenance problems in agricultural machinery, China has developed a device that effectively separates bearings and shafts, in order to reduce maintenance problems and to some extent reduce damage to agricultural machinery. It is mainly composed of a pneumatic system, adjustable slide rails, chucks, and corresponding shaft brackets. It mainly adjusts the length of the pull rod and can disassemble different bearings. Improve traditional disassembly equipment, increase the applicability of disassembly, and enhance the efficiency of work. At the same time, due to the relatively accurate bearing parts of agricultural machinery, the corresponding prices are relatively high, which places high requirements on the dismantling equipment and safety. At present, there are only two main tools for dismantling them, namely hydraulic grab handles and manual handles. Although manual tools can save energy, protect the environment, and have relatively strong flexibility, they also have certain shortcomings. They are time-consuming and laborious during use, and are difficult to operate on large equipment bearings; Although hydraulic tools can improve this problem and withstand larger loads, their work efficiency has significantly improved. However, during the operation process, they can cause certain damage to equipment, cause unnecessary waste, and even pose a threat to the safety of workers. Both of these methods cannot meet the current demand for agricultural machinery, which requires strengthening in-depth research and solving these problems.

2. Structure of universal bearing disassembly device

2.1 Structural composition

The universal bearing disassembly device mainly consists of the components of the air source, working components, control components, and corresponding auxiliary working components. The gas source is lost to generate compressed gas, which enters the working state through control components to perform various functions of the cylinder. After Z, it is fixed by auxiliary components and corresponding support work is done.

2.2 Working principle

During the process of dismantling bearings on agricultural machinery, the device displays that the bearings and shafts are placed on top of the chuck and shaft bracket, and then the height of the chuck is adjusted to the applicable range, that is, the center position of the shaft is placed in a balance with the center of the piston rod. Afterwards, adjust the upper part of the chuck, and then adjust the chuck frame and slide rail. Pay attention to controlling the distance between the shaft and piston rod at around 20cm. After adjusting this series, the nuts on the device should be fixed to avoid shaking and affecting work efficiency during operation. After Z, start the pneumatic system for operation.

2.3 Design of components

2.3.1 Firstly, the design of the chuck and chuck holder. The traditional agricultural machinery bearing disassembly tool room grab type chuck can cause certain damage to the equipment, and the position of the bearing is difficult to grasp and fix, which is not conducive to the development of work, and even cause unnecessary mechanical accidents. The new type of disassembly device is a chuck that can be adjusted through an encircling type. Simply put, it is composed of two half rings, with corresponding slots in the internal positions of the rings, which avoids damage to mechanical equipment and can also be adjusted according to work, improving work efficiency and applicability. At the same time, height adjustment can also be carried out, which can enhance the universality of the equipment to a certain extent and achieve bidirectional adjustment in both horizontal and vertical directions.

3.2 Adjustable slide rail and corresponding locking device for stroke adjustment. During the process of dismantling bearings of agricultural machinery, there are certain requirements for the applicability and corresponding adjustability of the dismantling equipment due to the influence of the position between the bearings and shafts. Its main purpose is to strengthen the adjustment of the position between the chuck and piston rod, which to some extent strengthens the applicability of the setting, improves universality, and also accelerates work efficiency. In addition, in order to ensure that the chuck is not affected by loads during operation, which may cause instability of the equipment, it is necessary to? Fix the bottom position of the disc. The movement between the slider and the slide rail is carried out through friction, which to some extent increases the damage to the slide rail. Therefore, rolling friction should be used to reduce the damage to the slide rail. Another thing to note is the locking device, which simply means tightening the locking ring through nuts, which is also a guarantee for stable disassembly work.

3.3 Selection of components. This device is disassembled under the drive of the pneumatic system, which is also the core of the equipment work. In the process of designing it, the main steps of the equipment work are as follows:? Based on this. In the actual work process, if the disassembly force is insufficient, the pneumatic system can be changed to a traditional hydraulic system, which not only strengthens the power of the equipment but also improves the efficiency of the work. During the process of selecting the original components, attention should be paid to the following points: establishment of work steps, design of pneumatic systems, and calculation of parameters. In the process of calculating parameters, there are several important parameters, namely: the parameters of the piston rod, the parameters of the cylinder wall, and the calculation of air consumption.

3. Research on the Dismantling Device for General Bearings of Agricultural Machinery

Through the practical work of this device, the selected bearing should be a commonly used model in modern agricultural machinery, which can be representative and also demonstrate the universality of the device. The main obstacle in the process of disassembling bearings is the friction generated during movement between the bearings and the shaft, especially as the contact area between the bearings and the shaft continues to increase, the required disassembly force will gradually increase. From this, it can be seen that when the range of the chuck holding the card is relatively within a reasonable range, the internal plane of the chuck is relatively neat without any concave or convex points; If there are no abnormalities in the operation of the pneumatic system, and the design of the piston rod is relatively reasonable, it can withstand the working pressure and load, ensuring the normal operation of the work. In addition, the dismantling range of general agricultural machinery and equipment is relatively broad, which can enhance the quality of work to a certain extent and improve work efficiency, reducing the damage to agricultural machinery and equipment to a minimum.

4. Conclusion

The universal bearing dismantling device for agricultural machinery significantly improves work efficiency, reduces unnecessary waste of manpower and material resources, and also reduces work risks, ensuring the safety and stability of work. At the same time, it also reduces the damage to equipment and has high promotion value.

2024 November 2th Week FK Product Recommendation:

Insert Bearings：

Insert bearings (SKF Y-bearings) are based on sealed deep groove ball bearings in the 62 and 63 series, but have a convex outer ring and in most cases an extended inner ring with a specific locking device, enabling quick and easy mounting onto the shaft.

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